1. 2002 National Emission Inventory (NEI)
Briefing by: David Misenheimer, USEPA
For: RPO Meeting
Location: St. Louis
Date: 11/4/03

2. Purpose of this Briefing
Share our current thinking
Get your reaction at this stage
Purpose is to:
Review the highlights of our current plans for the 2002 NEI
Get your input

3. Incorporate Revisions
Milestones for 2002 NEI
Complete Initial ’02 NEI
*Note: Dates are for completion of each step.
01/04*
Collect Data
Blend/Merge Data
External Review
Incorporate Revisions
Finalize Data Sets
Distribute Data
07/05*
06/04* QC QC
02/05*
10/05*
Major milestones for 2002 NEI:
January 1, 2004: Will complete ongoing work on the preliminary version.
Jan 1 to June 1, 2004: Will collect data from States/Locals/Tribes and some other information sources.
Agencies can submit revisions to the preliminary version or new data sets.
Note: will collect data for a few special cases after June 1.
Feb 2005: Will complete work on merging the data, QC, filling gaps. Will issue draft inventory for external (outside of EPA) review.
June 2005: External review period ends; begin incorporating revisions.
July 2005: Complete incorporation of revisions; begin final QC.
October 2005: Complete preparation of final 2002 NEI; begin preparing output data sets.
December 2005: Complete distribution of data. QC
12/05*
05/05*

4. Changes Compared w/ 1999 NEI
Updated input formats (NIF 3.0 & XML Schema)
CERR in place
Integrating HAPs and criteria data
Implementing EPA Data Standards
Incorporating Facility Registry System ID’s
NIF changes over mainly data standards plus some typo corrections and improved User Guide
XML users - FY03 exchange network grants w/ DE, SC, IN, KS, AZ; FY02 grants w/ NM, others.
Goal is to integrate HAPs and criteria for all sectors
Data standards will make NEI data compatible with data in other EPA systems
FRS ID’s will allow easy matching with facilities in other EPA (and State) databases

5. Changes Compared w/ 1999 NEI (continued)
More automated approach
Option for two rounds of S/L/T revisions
Specifying nonpoint categories where we will create a comprehensive, consistent set of estimates
Peer Review of final product & methodology
More detailed development plan - will post draft by Dec 1
More automated approach - QC, data transfers, data merging and gap filling, outputs to other systems and for modeling. Use more automated computer tools for QC and use more “clearly scripted” processes (as opposed to ad hoc).
Jan 1 to June 1, 2004 – Can either submit revisions to preliminary NEI (treating as a 1st draft) or can submit a whole new data set.
Feb 1 to May 1, 2005 – Can submit revisions to the draft NEI.
There are a number of nonpoint categories (and pollutants) where we will create a comprehensive, consistent set of estimates which we think will be sufficiently accurate. We will welcome S/L/T review and corrections, but because we have a consistent and documented method for these categories, the hurdle will be higher than has been in the past for submittals and revisions (i.e., not just submitting emissions #).
Likewise, we will identify a list of nonpoint categories (and pollutants) where we need S/L/T data.
These lists will help S/L/T prioritize their efforts re nonpoint stationary categories.
Will conduct Peer Review of the NEI methodology and data set.

6. Basis for Emission Estimates
EGU’s: CAMD CEM, DOE, S/L/T
NonEGU Point: S/L/T (2002, 2001, 1999)
NonPoint: EPA, S/L/T
Onroad: FHWA, MOBILE6, S/L/T
Nonroad: NONROAD Model, S/L/T
EGU’s – We plan to use our emission estimates except for nonMercury HAPs, for which we will take S/L/T estimates.
NonEGU Point – We rely heavily on S/L/T estimates, along with HAPS from MACT, TRI, and Industry. Will use 1999 estimates for some categories.
NonPoint – We will generate estimates for all major categories and pollutants but will use S/L/T data where we determine it is better.
OnRoad – Our goal is to use S/L/T model inputs and VMT where provided in a usable format. This goal depends largely on funding.
NonRoad – Our goal is to use S/L/T model inputs where provided in a usable format. For nonmodel categories (Locomotive, Comm Marine, Aircraft), we will use S/L/T emissions where available.

7. 2001 NEI Point Source Data Rcvd
2001 Data Reported
HAPs & Criteria
Criteria
Local Agencies

8. 2001 NEI Point Source Data Rcvd

9. Incorporation of Tribal Data
Point data will be added as is
Will be reconciled w/ data from S/L’s where necessary
Area/Mobile data will be added where possible
Prioritize on contribution to emissions, detail of data
Will be reconciled w/ data from E/S/L’s where necessary

10. Other NEI Issues Annual vs. daily emissions EGUs – federal data only?
Mobile sources - Tons vs. model inputs
Agriculture issues
Fires and open burning issues
Fugitive dust
Coordination with RPO inventory efforts
Relationship to future SIP inventories
Subsequent versions/ version proliferation
Improved data access
QA/QC
Peer review
Annual vs. Daily – Use only annual emissions from S/L’s and calculate daily emissions based on annual emissions and seasonal throughput? It's ok w/us if they give us just annual, if they have no better basis for daily than we would calculate ourselves, or where emissions are essentially flat?
EGU’s –Use no S/L data? Use only data from CEM (SO2, NOx), DOE fuel use plus AP42 ef’s (other criteria poll’s), Mercury & Other HAPs?.
Mobile – Get emissions (tons) from S/L’s or just MOBILE model inuts (temperatures, vehicle mix) and VMT?
Ag/Fires/Fug Dust - Improvements to methodology & activity data, transport modeling.
RPO EI’s – How to feedback what we learn to each other? Need to compare schedules and processes.
SIP EI’s - NEI and SIP EI’s may decouple at some point.
Versions – Need to minimize but there will probably be NEI, modeling EI, Trends, RPO’s, SIP EI’s, Rule EI’s, etc.
Access – Looking at ways to improve access to NEI via NEON, mapping tools, etc.
QA/QC – Better feedback to data providers, more rigorous QC, better documentation of our procedures, better tools, meeting IQ guidelines.
Peer Review – Looking at starting this soon for our procedures, preliminary data so that we can build in improvements based on review results.

11. EPA’s QC Priorities for S/L/T’s
We are able to estimate emissions for electric generators, area sources, mobile sources
Need State/Local/Tribes to provide data for and/or look closely at:
Nonutility point sources
Certain area source categories
Largest emitters for each pollutant (eg top 50)
Emissions, units (tons, lbs), stack parameters, locational coordinates, boiler size (esp top emitters)
Use consistent site ID’s. If starting a new ID system, give EPA a crosswalk.
S/L/T Data & QC Priorities – Emissions, units, stack parameters, locations, boiler size are most important for the largest emitters; these should be the priorities for providing and QC’ing data.
Site ID’s – We need S/L’s to report the same site ID’s as they reported in previous years, to help us match sources in different versions of the NEI. If they overhaul their ID’s then we need a crosswalk of old ID’s to new ID’s.

12. Next Steps
Outreach: RPO EI Forum, EPA RO’s, S/L/T’s, STAPPA/ ALAPCO Emissions & Modeling Committee, etc.
Nov 30 - Post draft plan
Modify plan based on input
January 1, Finalize and post initial version of ’02 NEI
January 1 to June 1, Receive EI revisions and new submittals
Outreach -
-Briefing RPO EI Forum at St. Louis meeting Nov 5
-Setting up mtgs with S/L’s via EPA RO’s
-Briefing STA PPA/ALAPCO Em & Mod Committee Nov 4
-Looking for other opportunities to meet w/ stakeholders to discuss the plan
Will post draft plan on CHIEF website Nov 30
Will modify the plan when significant improvements are made
Preliminary 2002 NEI – Will post Jan 1, 2004
January 1 to June 1, 2004 – Will receive new data sets and revisions to preliminary NEI.